Algebra 1 Quiz 16

Solve each equation in the system for the indicated variable.

for x: x + 3y = -3

• $x=-3y-3$

• $x=3y+3$

• $x=-3y+3$

Solve each equation in the system for the indicated variable.

for x:  x + y = 1

•  $x=-y\ +1$ 

•  $x=y+1$ 

•  $x=-y-1$ 

Solve each equation in the system for the indicated variable.

for y:  3x + y = 6

•  $y=3x-6$ 

•  $y=-3x+6$ 

•  $y=-3x-6$ 

Solve each equation in the system for the indicated variable.

for y:  2x + 3y= -9

•  $y=-\frac{2}{3}x\ +3$ 

•  $y=\frac{2}{3}x+3$ 

•  $y=-\frac{2}{3}x-3$ 

Solve each system by substitution.

x - y = 12

x + y =18

• (5, 3)

• (15, 3)

• (12, 3)

Solve each system by substitution.

x - y = -1

3x + 2y = 22

• (5, 1)

• (3, 0)

• (4, 5)

Identify the least common multiple that would eliminate the y-variable in each system of equations.

6x - 5y = - 4

4x + 2y = 28

• 22

• 10

• -24

• none of the above

Identify the least common multiple that would eliminate the y-variable in each system of equations.

2x + 4y = 26

3x - 6y = - 45

• 12

• 71

• 6

• none of the above

Solve each system by elimination.

7x - 5y = 52

2x + 5y = 47

• (11, 5)

• (6, 2)

• (3, 0)

• none of the above

Solve each system by elimination.

2x - 4y = - 4

3x + 2y = 22

• $\left(5,\ \frac{7}{2}\right)$

• $\left(-5,\ \frac{7}{3}\right)$
  

• $\left(5,\ 7\right)$
  

• none of the above